negotiator.boaframework.opponentmodel
Class ScalableBayesianModel

java.lang.Object
  negotiator.boaframework.OpponentModel
      negotiator.boaframework.opponentmodel.ScalableBayesianModel

public class ScalableBayesianModel
extends OpponentModel

Adapter for BayesianOpponentModelScalable for the BOA framework. Tim Baarslag, Koen Hindriks, Mark Hendrikx, Alex Dirkzwager and Catholijn M. Jonker. Decoupling Negotiating Agents to Explore the Space of Negotiation Strategies KNOWN BUGS: 1. Opponent model does not take the opponent's strategy into account, in contrast to the original paper which depicts an assumption about the opponent'strategy which adapts over time. 2. The opponent model becomes invalid after a while as NaN occurs in some hypotheses, corrupting the overall estimation.

Author:

Mark Hendrikx

Field Summary

Fields inherited from class negotiator.boaframework.OpponentModel

negotiationSession, opponentUtilitySpace

Constructor Summary

ScalableBayesianModel()

Method Summary

void	cleanUp() Removes references to the objects used by the opponent model.
double	getBidEvaluation(Bid bid) Determines the utility of a bid according to the preference profile.
java.lang.String	getName()
UtilitySpace	getOpponentUtilitySpace()
double	getWeight(Issue issue) Returns the weight of a particular issue in the domain.
void	init(NegotiationSession negoSession, java.util.HashMap<java.lang.String,java.lang.Double> parameters) Initializes the model.
void	initializeModel(NegotiationSession negotiationSession)
void	updateModel(Bid opponentBid, double time) Method used to update the opponent model.

Methods inherited from class negotiator.boaframework.OpponentModel

endSession, getIssueWeights, init, isCleared, loadData, setOpponentUtilitySpace, setOpponentUtilitySpace, storeData, updateModel

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ScalableBayesianModel

public ScalableBayesianModel()

Method Detail

init

public void init(NegotiationSession negoSession,
                 java.util.HashMap<java.lang.String,java.lang.Double> parameters)
          throws java.lang.Exception

Description copied from class: OpponentModel

Initializes the model. The init method should always be called after creating an opponent model.

Overrides:

init in class OpponentModel

Parameters:

negoSession - reference to the state of the negotiation

Throws:

java.lang.Exception

initializeModel

public void initializeModel(NegotiationSession negotiationSession)

updateModel

public void updateModel(Bid opponentBid,
                        double time)

Description copied from class: OpponentModel

Method used to update the opponent model.

Specified by:

updateModel in class OpponentModel

Parameters:

opponentBid - to update the model with.

time - at which the bid was offered.

getBidEvaluation

public double getBidEvaluation(Bid bid)

Description copied from class: OpponentModel

Determines the utility of a bid according to the preference profile.

Overrides:

getBidEvaluation in class OpponentModel

Parameters:

bid - of which the utility is calculated.

Returns:

Utility of the bid

getWeight

public double getWeight(Issue issue)

Description copied from class: OpponentModel

Returns the weight of a particular issue in the domain.

Overrides:

getWeight in class OpponentModel

Parameters:

issue - from which the weight should be returned

Returns:

weight of the given issue

getOpponentUtilitySpace

public UtilitySpace getOpponentUtilitySpace()

Overrides:

getOpponentUtilitySpace in class OpponentModel

Returns:

the estimated utility space of the opponent

cleanUp

public void cleanUp()

Description copied from class: OpponentModel

Removes references to the objects used by the opponent model.

Overrides:

cleanUp in class OpponentModel

getName

public java.lang.String getName()

Overrides:

getName in class OpponentModel

Returns:

name of the opponent model.